##yal ##ly ##l cat ##ion is formed . as discussed extensively above , the typical course for this intermediate is elimination followed by en ##olate taut ##ome ##rization . however , these two steps can be interrupted by various nu ##cle ##op ##hil ##es and electro ##phile ##s , respectively . ox ##yal ##ly ##l cat ##ion trapping has been developed extensively by fred ##rick g . west of the university of alberta and his review covers the field . the ox ##yal ##ly ##l cat ##ion can be trapped with het ##ero ##ato ##m and carbon nu ##cle ##op ##hil ##es and can also undergo cat ##ion ##ic cy ##cl ##oa ##dd ##ition ##s with various te ##ther ##ed partners . shown below is a cascade reaction
##yallyl cation is formed. as discussed extensively above, the typical course for this intermediate is elimination followed by enolate tautomerization. however, these two steps can be interrupted by various nucleophiles and electrophiles, respectively. oxyallyl cation trapping has been developed extensively by fredrick g. west of the university of alberta and his review covers the field. the oxyallyl cation can be trapped with heteroatom and carbon nucleophiles and can also undergo cationic cycloadditions with various tethered partners. shown below is a cascade reaction